LLM Reference
OpenRouter

Using GPT-5.2 Codex on OpenRouter

Implementation guide · GPT-5 · OpenAI

Serverless

OpenRouter exposes GPT-5.2 Codex through model ID openai/gpt-5.2-codex. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-30. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at OpenRouter and generate an API key.
  2. 2
    Use the OpenRouter SDK or REST API to call openai/gpt-5.2-codex — see the documentation for request format.
  3. 3
    You'll be billed $1.75/1M input, $14.00/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$1.75
Output tokens$14.00

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt Caching

About GPT-5.2 Codex

GPT-5.2-Codex is OpenAI's agentic coding model built on GPT-5.2, released December 18, 2025. Optimized for long-horizon professional software engineering tasks including large refactors, multi-file changes, and codebase migrations. Features context compaction for handling tasks exceeding a single context window, enhanced vision for interpreting screenshots, diagrams, and UI, and strengthened safeguards for defensive cybersecurity workflows. Available to paid ChatGPT users and via the Responses API.

Full model details →

Model Specs

Released2025-12-18
Context400k
ArchitectureDecoder Only
Knowledge cutoff2025-08

More Models on OpenRouter

GPT-5.2GPT-5GPT-5 MiniGPT-5 NanoGPT-5 ChatGPT-5 Codex
All models on OpenRouter →

Also available on(2)

Vercel AI Gateway$1.75/1MOpenAI API$1.75/1M
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Provider

OpenRouter
OpenRouter

OpenRouter, Inc.

New York, NY, USA